Pop diva Whitney Houston made her first television appearance in the U.K. in 12 years during her eagerly anticipated comeback performance on Britain's reality singing competition X Factor on Sunday.

Houston performed her latest single "Million Dollar Bill" from her #1 album "I Look To You" complete with backup dancers and her own wardrobe malfunction whena strap at the back of her long silver dress snapped open.

But according to UK fans, it was Houston's lackluster vocals and loopy behavior (reminiscent of her past drug days) during her post- performance interview that have disappointed fans and provoked a barrage of negative comments on the X Factor website criticizing the singer.

One fumed: "What a huge waste of her talent. People should watch and learn what harm one can do to ones self. I hope for Whitney and all her fans she gets a grip and rejoins this planet."

It goes without saying that Houston has damaged the voice that made her a superstar, yet I believe fans have begun to accept the remnants of what once was and are rooting for her success.

Was she high during this performance? That's the great online debate. Take a look at the performance in the clip below and judge for yourself.

After having such a very public battle with drugs I guess a cloud of suspicion will forever remain over her head. She won't ever be able to have a "not so perfect" night without raising eyebrows. With that said, I don't think she's relapsed. I think the years of drug abuse have taken its toll on her physically & vocally.

I really don't believe that Whitney is totally sober. The smoking gun was the Oprah interview when she said, "I'll have a drink every once in awhile..." a recovering addict she be refraining from all things addictive.Futhermore, as talented as Whitney was vocally she her singing technique itself helped to irreperably damage her vocals. I remember when Whitney used to hit those notes and her jaw would just vibrate...That is NOT a good vocal technique, and she was singing like that for years. Ever wonder why Patti Labelle and Celine Dion still sound fabulous? They both truly understand how to preserve their voices.Whitney needs help and a REAL intervention.

you know...i was talking with my aunt the other day and some how whitney came up, and I was saying "well she saying she clean" and my aunt's response was "she not clean, she DINGY"..."what do you mean by dingy?"..."means she's somewhere between clean and dirty, that girl not clean, she DINGY." i. die.

i hate to say this...but after all that autotune ON the album...i've finally reached my breaking point. i do not want anymore new whitney material. i'll make do with what i already have.